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Power Door Lock Test 1A - Identifying Power Door Lock System Problems

NOTE: Perform SYMPTOM ID TEST 1A  before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION  . For wiring diagrams, refer to WIRING DIAGRAMS  . Refer to DOOR LOCKS - POWER & KEYLESS ENTRY SYSTEM article. After each repair, perform TEST VER-1A  .
CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
  1. Using scan tool, select BODY SYSTEM, then DOOR MODULES. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool displays NO RESPONSE, or any other message, go to VEHICLE COMMUNICATIONS TEST 1A  .
    NOTE: Power door lock diagnostics are separated into 10 tests. Verify failure or customer's complaint and ensure vehicle is experiencing problem at this time.
  2. Lower both front door windows. Remove key from ignition switch. Lock and unlock doors from both door switches and observe door locks. Perform indicated test(s) if any problems(s) listed in POWER DOOR LOCK DIAGNOSTIC TEST DIRECTORY  table exists. If power door locks operate properly, go to next step.
    POWER DOOR LOCK DIAGNOSTIC TEST DIRECTORY

    Problem Perform
    One Door
    Fails To Lock & Unlock POWER DOOR LOCK TEST 2A 
    Left Front Door
    Fails To Lock POWER DOOR LOCK TEST 3A 
    Fails To Unlock POWER DOOR LOCK TEST 4A 
    All Doors (Exc. Left Front Door)
    Fails To Lock & Unlock POWER DOOR LOCK TEST 5A 
    Fails To Lock POWER DOOR LOCK TEST 6A 
    Fails To Unlock POWER DOOR LOCK TEST 7A 
    Locks Inoperative From One Module (1)
    (1) Replace defective module.
  3. Insert key in ignition switch and open left front door. Lock doors. If doors do not lock, go to next step. If doors lock, go to POWER DOOR LOCK TEST 8A  .
  4. Operate doors with remote keyless entry transmitter. If transmitter does not operate, go to POWER DOOR LOCK TEST 9A  . If transmitter operates, drive vehicle at speeds above 15 MPH. If doors do not lock, go to POWER DOOR LOCK TEST 10A  . If doors lock, system is operating properly at this time.
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